JP5342757B2 - Liquid bleach composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bleach composition which exhibits excellent detergency to hydrophobic stains such as sebaceous stains, moreover has the viscosity restrained from being changed with time and is excellent in usability when the bleach composition is poured into a measuring cup from a main body bottle or applied to clothes from the measuring cup. <P>SOLUTION: The bleach composition contains (a) secondary alkane sulfonate and/or its salt, (b) hydrogen peroxide and (c) a polymer compound having an alkylene terephthalate unit and an oxyalkylene unit. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a bleach composition.

In recent years, the functions required for liquid bleach compositions have been diversified.
For example, a bleaching composition in which only hydrogen peroxide is blended as a component for removing stains does not have a sufficient detergency for hydrophobic stains such as sebum stains such as lip and sleeve stains.
On the other hand, a bleaching composition has been developed in which a surfactant and a specific polymer compound are used in combination with hydrogen peroxide to improve the detergency against hydrophobic soil.
As an example of such a bleaching agent composition, a liquid bleaching composition containing hydrogen peroxide, a surfactant, and a terephthalic acid ester type polymer compound has been proposed (see Patent Document 1). According to Patent Document 1, it is disclosed that a liquid bleaching composition containing a terephthalic acid ester type polymer compound has a high effect of removing sebum stains.
JP 2005-187695 A

However, terephthalic acid ester type polymer compounds are easily decomposed due to deterioration with the passage of time. Therefore, when a bleaching composition containing a terephthalic acid ester type polymer compound is stored for a long period of time, the viscosity of the composition increases and the fluidity decreases, and the liquid sags when measuring from the main body bottle to the measuring cap. There is a problem that usability deteriorates, for example, it is difficult to apply from a cap to clothing.
Therefore, the bleaching agent composition is required to have excellent usability by suppressing a change in viscosity with time, in addition to good detergency against hydrophobic soil.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a bleaching composition that has good detergency against hydrophobic soils and is excellent in usability.

The present inventors propose the following means in order to solve the above problems.
That is, the liquid bleach composition of the present invention comprises a secondary alkanesulfonic acid having an alkyl chain length of 13 to 17 carbon atoms and / or a salt thereof (a) 0.1 to 3% by mass , hydrogen peroxide (b) And 0.1 to 3% by mass of a polymer compound (c) having an alkylene terephthalate unit and an oxyalkylene unit.

  According to the present invention, it is possible to provide a bleaching composition having good detergency against hydrophobic soils and excellent usability.

≪Bleach composition≫
The bleaching composition of the present invention comprises a secondary alkanesulfonic acid and / or a salt thereof (a), hydrogen peroxide (b), a polymer compound (c) having an alkylene terephthalate unit and an oxyalkylene unit. contains.

<Secondary alkanesulfonic acid and / or salt thereof (a)>
Secondary alkanesulfonic acid and / or salt thereof (a) (hereinafter referred to as component (a)) is a surfactant also called “paraffin sulfonic acid”, and usually has 10 to 21 carbon atoms per molecule. It is provided in the form of a mixture of secondary alkyl sulfonates.
In this invention, it is preferable to use what contains 80 mass% or more of C2-C18 secondary alkyl sulfonates per molecule in the said mixture as (a) component, and contains 90 mass% or more. It is more preferable to use those as component (a).
The mixture may contain a small amount of a primary alkyl sulfonate, disulfonate, or polysulfonate.
Examples of the salt include alkali metal salts, ammonium salts, and alkanolamine salts. Specific examples include sodium salts, potassium salts, lithium salts, ammonium salts; mono-, di-, or triethanolamine salts. These may be mixed.

  Commercially available products that can be suitably used as the component (a) include HOSTAPUR SAS 60 (Clariant; content of 14 to 17 carbon atoms of 90% by mass or more), MERSOL80 (Bayer; average carbon number of 15), MARLON series (SASOL) PS65, PS60, PS60W, carbon number 10-18 (content of carbon number 13-17 is 90% by mass or more), and the like, and HOSTAPUR SAS 60 and MARLON PS65 are particularly preferable.

  Examples of the method for producing the component (a) include a sulfooxidation method. Specifically, it is produced by neutralizing paraffin after sulfooxidation, most of which becomes monosulfonate. At that time, the component (a) contains primary alkyl sulfonate, disulfonate, polysulfonate, sodium sulfate, unreacted paraffin, water and the like as by-products or impurities.

(A) A component can be used 1 type or in mixture of 2 or more types.
The content of the component (a) in the bleaching composition is preferably 0.1 to 10% by mass, more preferably 0.1 to 5% by mass, and 0.25 to 2% by mass. It is particularly preferred. When it is at least the lower limit of the content ratio, the viscosity change with time is suppressed, and the usability is further improved. On the other hand, if it is less than or equal to the upper limit value, the detergency against hydrophobic soil is further improved.

<Hydrogen peroxide (b)>
In the bleaching composition of the present invention, hydrogen peroxide (b) (hereinafter referred to as component (b)) is an ingredient having an oxidizing power and responsible for the bleaching action.
The content ratio of the component (b) in the bleaching composition is preferably 0.1 to 6% by mass, and more preferably 1 to 5% by mass. Bleaching power improves more that it is more than the lower limit of this content rate. On the other hand, the liquid stability of a bleaching agent composition improves more as it is below an upper limit.

<High molecular compound (c) having an alkylene terephthalate unit and an oxyalkylene unit>
In the present specification and claims, the “unit” means a monomer unit constituting a polymer.
In the bleaching composition of the present invention, the polymer compound (c) (hereinafter referred to as (c) component) comprises an alkylene terephthalate unit (hereinafter referred to as (c1) unit) and an oxyalkylene unit (hereinafter referred to as (c2)). A unit).

-(C1) unit As a (c1) unit, what is represented, for example by the following general formula (I) is mentioned suitably.

［式中、Ｒは低級アルキレン基である。］

[Wherein, R represents a lower alkylene group. ]

In formula (I), the lower alkylene group of R is an alkylene group having 1 to 6 carbon atoms, preferably 1 to 4 carbon atoms, and particularly preferably 2 to 4 carbon atoms.
Specific examples of the unit (c1) include ethylene terephthalate, propylene terephthalate, butylene terephthalate, or a mixture thereof. Among these, ethylene terephthalate is preferable.

(C1) The unit may be contained in the component (c) by one type or two or more types.
The proportion of the (c1) unit in the component (c) is preferably 5 to 90 mol%, more preferably 10 to 80 mol%, based on the total of all units constituting the component (c). . When the ratio is within the range, the detergency against hydrophobic soil is sufficiently exhibited.

-(C2) unit (c2) As a unit, what is represented, for example by the following general formula (II) is mentioned suitably.

［式中、Ｒ’は低級アルキレン基である。］

[Wherein, R ′ represents a lower alkylene group. ]

In the formula (II), examples of the lower alkylene group for R ′ include the same as the lower alkylene group for R in the formula (I), and an ethylene group, a propylene group, or a mixture thereof is preferable.
n is an integer of 1 or more, preferably 5 to 150, and more preferably 10 to 100.
(C2) Units include, when n = 1, oxyethylene units, oxypropylene units; when n ≧ 2, include polyoxyethylene units, polyoxypropylene units, polyoxyethylene polyoxypropylene units, etc. However, polyoxyethylene units are preferred.

(C2) The unit may be contained 1 type, or 2 or more types in (c) component.
The proportion of the (c2) unit in the component (c) is preferably 10 to 95 mol%, more preferably 20 to 90 mol%, based on the total of all units constituting the component (c). . When the ratio is within the range, solubility in water is improved, and a liquid bleach composition having a higher transparency can be obtained.

  The component (c) may be a polymer compound in which the (c1) unit and the (c2) unit are randomly polymerized, or may be a polymer compound polymerized in a block. A polymer compound that is polymerized is particularly preferable.

  In addition, the component (c) includes units other than these essential units (c1) and (c2), such as units derived from a polymerization initiator, a polymerization terminator and the like, and other copolymerizable units. You may go out. However, it is preferable that 80 mol% or more, preferably 90 mol% or more of the total of all the units constituting the component (c) is constituted by both of these essential (c1) units and (c2) units. .

  Specific examples preferable as the component (c) are shown in the following general formula (III).

In formula (III), A and B are each independently a hydrogen atom or a methyl group, preferably a methyl group.
R ¹ is an alkylene group having 2 to 4 carbon atoms.
R ² is a methyl group or a hydrogen atom, and is preferably a methyl group.
x is 0 to 10, preferably 0.5 to 5, and more preferably 0.5 to 2.5.
y is 1 to 100, preferably 1 to 80, and more preferably 1 to 50.
When x and y are in the above ranges, the detergency against hydrophobic soil is sufficiently exhibited. Moreover, the solubility to water improves and the liquid bleach composition with a high transparency is obtained.

  Moreover, in the said general formula (III), what substituted the partial structure shown in the parenthesis which attached | subjected the subscript x to the structure shown in the following general formula (IV) may be contained.

Wherein (IV), ^{R 2} and x are the same as ^{R 2} and x in the formula (III).

As a weight average molecular weight of (c) component, it is preferable that a lower limit is 500 or more, It is more preferable that it is 800 or more, It is especially preferable that it is 1500 or more. On the other hand, the upper limit value is preferably 8000 or less, more preferably 7000 or less, and particularly preferably 6000 or less.
When used in this weight average molecular weight range, the water dispersibility can be improved, and the hydrophobic bleaching and washing performance of hydrophobic soils of hydrophobic fibers (such as polyester fibers) can be fully expressed. Since the liquid appearance of a bleaching composition becomes favorable, it is preferable in practical use.
Here, the “weight average molecular weight” is a value obtained by converting a value measured by GPC (gel permeation chromatography) using THF (tetrahydrofuran) as a solvent using PEG (polyethylene glycol) as a calibration curve. .

(C) The manufacturing method of a component can use the arbitrary methods currently disclosed by various literature, a textbook, or a patent. For example, Journal of Polymer Science, Volume 3, pages 609 to 630 (1948), Journal of Polymer Science, Volume 8, pages 1 to 22 (1951), and the method described in JP-A-61-218699 May be used, and other methods may be used.
As an example, the component (c) can be produced by an esterification reaction between terephthalic acid and alkylene glycol.

  Specific examples of the component (c) include trade name TexCare SRN-100 (manufactured by Clariant GmbH, Germany; weight average molecular weight 3000) (hereinafter abbreviated as SRN-100), trade name TexCare SRN-300 (Germany). , Manufactured by Clariant GmbH; weight average molecular weight 7000) (hereinafter abbreviated as SRN-300), and the like. In particular, SRN-100 is preferable because a liquid bleaching composition having high solubility in water and high transparency can be obtained.

Generally, when a polymer compound is blended in a liquid, the liquid tends to increase in viscosity (thickening) with time.
On the other hand, the component (c) in the present invention, particularly SRN-100, has a function as a viscosity modifier and has a viscosity-reducing action of the liquid bleach composition.

(C) A component can be used 1 type or in mixture of 2 or more types.
The content ratio of the component (c) in the bleaching composition is preferably 0.1 to 5% by mass, and more preferably 0.25 to 2% by mass. When it is at least the lower limit of the content ratio, the detergency against hydrophobic soil is further improved. On the other hand, when it is less than or equal to the upper limit value, a change in viscosity due to deterioration of the component (c) with time is suppressed, and the usability is further improved.

<Other ingredients>
In addition to the components (a) to (c), the bleach composition of the present invention includes a surfactant, a bleach activator, a metal ion scavenger, a radical trap agent, a pH adjuster, a hydrotrope agent, and inorganic salts. In general, components such as silicones, bactericides, fluorescent dyes, enzymes, fragrances and the like that are generally blended into liquid detergent compositions and liquid bleach compositions can be blended as appropriate.

(Surfactant)
Examples of the anionic surfactant include linear or branched alkylbenzene sulfonic acid or a salt thereof, α-olefin sulfonate, linear or branched alkyl sulfate ester salt; linear or branched Alkyl ether sulfate ester salt or alkenyl ether sulfate ester salt having a chain alkyl group or alkenyl group and having an average addition mole number of 0.5 to 8 moles of ethylene oxide added; α-sulfo fatty acid ester salt, higher fatty acid Examples include salts.
Examples of the salt include alkali metal salts such as sodium salt and potassium salt; alkaline earth metal salts such as magnesium salt, and the like. Alkali metal salts are preferable, and sodium salts are more preferable.

As a nonionic surfactant, what is shown by the following structural formula is mentioned, for example.
R ³ —O (R ⁴ O) _{n ′} H
In the above structural formula, R ³ is preferably a linear or branched alkyl group or alkenyl group having 8 to 16 carbon atoms.
The number of carbon atoms of R ³ is 10 to 14 is more preferable. When the number of carbon atoms is 8 or more, the detergency is improved. On the other hand, when the number of carbon atoms is 16 or less, the solubility is improved.
Among them, R ³ is preferably an alkyl group, specifically, an octyl group, a nonyl group, a decyl group, an undecyl group, a dodecyl group, a tridecyl group, a tetradecyl group, a pentadecyl group, a hexadecyl group, and a dodecyl group, A tetradecyl group is particularly preferred.
In the structural formula, examples of R ⁴ O include an oxyethylene group, an oxypropylene group, an oxybutylene group, and an oxypentylene group. An oxyethylene group and an oxypropylene group are preferable, and an oxyethylene group is particularly preferable. R ⁴ O may be a single type or a combination of two or more types.
In the structural formula, n ′ is preferably 3 to 15.
In addition to those represented by the above structural formula, alkyl glycosides, alkyl polyglycosides, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene fatty acid esters, polyoxyethylene fatty acid ester oxyethylene propylene block polymers, fatty acid monoglycerides, etc. Can be mentioned.

Examples of the cationic surfactant include various quaternary ammonium salts such as a mono long chain hydrocarbon type quaternary ammonium salt and a di long chain hydrocarbon type quaternary ammonium salt.
Examples of amphoteric surfactants include carboxybetaine, sulfobetaine, and hydroxysulfobetaine.

  The content of the surfactant in the bleaching composition is preferably 0.5 to 40% by mass, more preferably 3 to 40% by mass, and still more preferably 8 to 30% by mass. . When it is at least the lower limit of the content ratio, the detergency against hydrophobic soil is further improved. On the other hand, the storage stability of a bleaching composition improves more that it is below an upper limit. Moreover, it is preferable also from an economic side.

(Bleaching activator)
Examples of the bleach activator include tetraacetylethylenediamine, pentaacetylglucose, sodium octanoyloxybenzenesulfonate, sodium nonanoyloxybenzenesulfonate, sodium decanoyloxybenzenesulfonate, sodium undecanoyloxybenzenesulfonate, Sodium dodecanoyloxybenzenesulfonate, octanoyloxybenzoic acid, nonanoyloxybenzoic acid, decanoyloxybenzoic acid, undecanoyloxybenzoic acid, dodecanoyloxybenzoic acid, octanoyloxybenzene, nonanoyloxybenzene, decanoyloxy Examples thereof include organic peracid precursors such as benzene, undecanoyloxybenzene, and dodecanoyloxybenzene. Of these, sodium nonanoyloxybenzenesulfonate, sodium dodecanoyloxybenzenesulfonate, and decanoyloxybenzoic acid are preferred.
These can be used individually by 1 type or in combination of 2 or more types.
The content ratio of the bleach activator in the bleach composition is preferably 0.1 to 5% by mass, and more preferably 0.1 to 2% by mass. Bleaching power further improves that it is more than the lower limit of this content rate. On the other hand, the liquid stability of a bleaching agent composition improves more as it is below an upper limit. Moreover, it is preferable also from an economic side.

(Metal ion scavenger)
Examples of the metal ion scavenger include citric acid; organic phosphonic acid derivatives such as 1-hydroxyethane-1,1-diphosphonic acid, nitrilotrimethylenephosphonic acid, ethylenediaminetetrakismethylenephosphonic acid; nitrilotriacetic acid, ethylenediaminetetraacetic acid, hydroxy Examples include aminopolyacetic acids such as ethylethylenediamine triacetic acid, diethylenetriaminepentaacetic acid, and triethylenetetraminehexaacetic acid; organic acids such as dicarboxymethylglutamic acid; and polymer chelating agents such as polyacrylic acid. Of these, organic phosphonic acid derivatives are preferable, and 1-hydroxyethane-1,1-diphosphonic acid is particularly preferable.
These can be used individually by 1 type or in combination of 2 or more types.
The content of the metal ion scavenger in the bleaching composition is preferably 0.1 to 3% by mass, and more preferably 0.2 to 2% by mass. Bleaching power further improves that it is more than the lower limit of this content rate. Moreover, in a bleaching agent composition, decomposition | disassembly of (b) component is suppressed and stability improves. On the other hand, the liquid stability of a bleaching agent composition improves more as it is below an upper limit. Moreover, it is preferable also from an economic side.

(Radical trapping agent)
As the radical trapping agent, for example, a phenol radical trapping agent can be suitably used. When a phenol radical trapping agent is used, the decomposition of the component (b) is further suppressed and the stability is improved. In particular, when the pH of the bleaching composition is 5 or more, it is preferable to use it together with the metal ion scavenger.
Also, when left on for a long time after being applied to clothing due to misuse, etc., the clothing will be damaged by abnormal decomposition of the component (b) due to the metal in the dirt or the component (b) highly reactive with the component There is a case. In such a case, the addition of the phenol-based radical trapping agent makes it possible to suppress the clothing damage as described above.
The phenol-based radical trapping agent is phenol or a phenol derivative, and preferred examples of the phenol derivative include a compound having a phenolic OH group (phenol compound), an ester derivative or an ether derivative thereof. The substitution position may be any of the ortho position, the meta position, and the para position. Especially, the compound (phenol compound) which has a phenolic OH group is more preferable. Among them, a compound having an oxidation-reduction potential (OP) ₀ of 1.25 V or less described in “GE Penketh, J. Appl. Chem”, pages 7,512 to 521 (1957). Is more preferable, and a compound of 0.75 V or less is particularly preferable.
Among the above compounds, dimethoxyphenol, catechol, hydroquinone, p-methoxyphenol, dibutylhydroxytoluene (BHT) and the like are preferable, and p-methoxyphenol is particularly preferable.
A radical trap agent can be used individually by 1 type or in combination of 2 or more types as appropriate.
The content ratio of the radical trapping agent in the bleaching composition is preferably 0.01 to 6% by mass, and more preferably 0.05 to 1% by mass. When it is at least the lower limit of the content ratio, the decomposition of the component (b) in the bleaching composition is further suppressed, and the stability is further improved. On the other hand, if it is less than or equal to the upper limit value, the effect of containing the radical trapping agent can be sufficiently obtained, which is preferable from the economical viewpoint.

(PH adjuster)
Examples of pH adjusters include inorganic acids such as hydrochloric acid, sulfuric acid, and phosphoric acid; organic acids such as p-toluenesulfonic acid, citric acid, and phosphonic acid derivatives; sodium hydroxide, potassium hydroxide, sodium carbonate, and sodium bicarbonate. Monoethanolamine, diethanolamine, triethanolamine, ammonia and the like.
These can be used individually by 1 type or in combination of 2 or more types.

(Hydrotrope agent)
Examples of the hydrotrope include monohydric alcohols such as ethanol and isopropanol; polyhydric alcohols such as ethylene glycol, propylene glycol, polyethylene glycol, and glycerin.
These can be used individually by 1 type or in combination of 2 or more types.
It is preferable that the content rate of the hydrotrope agent in a bleaching agent composition is 0.1-10 mass%.

(Inorganic salts)
Examples of inorganic salts include sodium chloride, potassium chloride, sodium sulfate, sodium carbonate, potassium carbonate, sodium borate and the like.

  In the bleaching composition of the present invention, the pH of the stock solution at 25 ° C. is preferably 2 to 7, and more preferably 3 to 6. When the pH is within the above range, the storage stability of the bleach composition is better, and the detergency against hydrophobic soil is further improved.

The bleaching composition of the present invention can be produced by a conventional method. As an example, water (ion-exchanged water, purified water, etc.) is used so that the components (a) to (c) and other components, if necessary, are mixed in a desired amount in terms of the pure content of each component. It can be prepared by dissolving in water and mixing, and adjusting to a predetermined pH using a pH adjuster.
In the production of the bleaching agent composition of the present invention, the pH when the component (b) is blended is preferably 6 or less. Moreover, it is preferable that pH at the time of mix | blending (c) component shall be 4-7. Thereby, (b) component and (c) component can be mix | blended more stably, and the effect of this invention improves further.

As described above, according to the bleaching composition of the present invention, the detergency against hydrophobic soil is good and the usability is also excellent. The reason why such an effect can be obtained is estimated as follows.
The bleaching composition of the present invention comprises a secondary alkanesulfonic acid and / or a salt thereof (a), hydrogen peroxide (b), a polymer compound (c) having an alkylene terephthalate unit and an oxyalkylene unit. contains.
Among these essential components, the component (b) is an essential component for the bleach composition to function as an oxygen bleach.
The component (c) exhibits an excellent effect in removing hydrophobic dirt, and can also remove hydrophobic dirt adhered to hydrophobic fibers such as polyester fibers and acrylic fibers.
However, as described above, the terephthalic acid ester type polymer compound such as the component (c) is easily decomposed due to deterioration with time. And since the effect (thinning action) which suppresses the increase in the viscosity of the bleaching composition which (c) component has by the influence of this decomposition | disassembly becomes difficult to be obtained, a bleaching composition becomes thickened and fluidity | liquidity Decreases and the usability deteriorates.
In this invention, in addition to (b) component and (c) component, (a) component is further contained as an essential component. The component (a) has a secondary alkyl group and has a branched bulky structure.
In the bleach composition of the present invention, the reason is not clear, but the interaction between the component (a) and the component (c) specifically works, and the effect of the bulky structure of the component (a) (C) Viscosity change with the lapse of time of the bleaching composition due to the influence of decomposition of the component is suppressed.
Moreover, (a) component is an anionic surfactant and is a component which contributes also to the improvement of a cleaning effect.
Therefore, it is presumed that the effect of the present invention can be obtained by the configuration composed of the components (a) to (c).

Further, according to the bleaching composition of the present invention, the component (b) and the component (c) can be stably blended in the composition, and the deterioration of the cleaning performance due to the decomposition of the component (b) and the component (c) is suppressed. it can.
In addition, when the bleach composition of the present invention is contained in a container with a cap, the bleach composition can be easily weighed from the container body bottle to the measuring cap, and the applicability from the measuring cap to the clothing is also good. is there. As described above, the bleaching composition of the present invention is difficult to drip from the container, and the bleaching composition hardly touches the hand, so that it can be used safely.

  Hereinafter, the present invention will be described in more detail using examples, but the present invention is not limited to these examples. “%” Means “% by mass” unless otherwise specified.

(Examples 1-15, Comparative Examples 1-6)
The bleaching composition of each example shown to Tables 3-4 was manufactured by the conventional method using the component shown in Table 1. However, Examples 10 and 11 are reference examples.
In addition, the unit of the compounding quantity in Tables 3-4 shows the mass% on the basis of the total mass of a bleaching agent composition. Moreover, the compounding quantity in Tables 3-4 shows the pure part conversion value of the component shown in Table 1. “Balance” indicating the blending amount of purified water means that the total amount is adjusted to 100% by mass.

<Evaluation of bleach composition>
Using the bleaching composition of each example, the cleaning power against hydrophobic soil, the viscosity of the bleaching composition, and the usability were evaluated by the following methods.

[Evaluation of detergency against hydrophobic soils]
A sebum model was selected as one of the hydrophobic soils.
1) Preparation of dirt cloth As a model of sebum secreted from the human body, a mixture of oleic acid / triolein was adopted, and a dirt cloth was prepared as follows.
0.5 g of oleic acid and 0.5 g of triolein were dissolved in 15 g of chloroform, and 0.01 g of carbon was added as a washing indicator and dispersed well. 0.01 mL of this dispersion was dropped onto a clean cloth obtained by cutting a polyester cloth (polyester tropical cloth) into 5 cm × 5 cm and air-dried to prepare a dirt cloth.
2) Washing method 0.12 mL of the bleaching composition of each example was applied to 5 pieces of soiled cloth and left for 5 minutes. Thereafter, using a Terg-O-Tometer (manufactured by U.S. Testing) for 10 minutes (120 rpm, 25 ° C., 4 ° DH tap water, bath ratio 30 times, no detergent), then dehydrated for 1 minute. Then, it was rinsed with running water for 2 minutes and then dehydrated for 1 minute.
The washed dirt cloth is dried with an iron, then the reflectivity (R ") is measured using a reflectometer (manufactured by Nippon Denshoku Co., Ltd., product name: Σ90), and washed by the Kubelka-Munk formula expressed by the following formula The rate (%) was determined and the results are shown in Tables 3-4.
Evaluation of the detergency against hydrophobic soil was carried out by the average value of 5 soiled cloths for each of the bleaching compositions in each example. When the cleaning rate exceeded 50%, the cleaning power was judged to be sufficiently clean and good cleaning power.

[Evaluation of viscosity of bleach composition]
The viscosity after storing the bleach composition at 50 ° C. for 1 month was evaluated as follows.
500 mL of the bleaching composition of each example was accommodated in a container with a cap shown in FIG. 1, and the container was stored at 50 ° C. for 1 month, and then allowed to stand at room temperature (about 25 ° C.) for 1 day.
Thereafter, the bleaching composition in the container is transferred to a 300 mL glass tall beaker, and using a B-type viscometer (No. 1 rotor), the bleaching composition is subjected to measurement conditions of 60 rpm, a guard, and 25 ° C. The viscosity (mPa · s) of was measured. The results are shown in Tables 3-4.
However, the initial viscosity of the bleaching composition before starting the storage was adjusted to 60 mPa · s. The viscosity was adjusted by adjusting the amount of nonionic (polyoxyethylene lauryl ether) to 5% by mass.
In this evaluation, the viscosity of the bleaching composition may be separated from the bleaching composition having a viscosity after storage exceeding 200 (mPa · s). Therefore, the difference between the initial viscosity and the viscosity after storage is smaller. preferable.

In FIG. 1, the container 1 with a cap is formed by covering the upper opening of the main body bottle 3 with a nozzle cap 5 having a measuring cap 2 and integrating the main body bottle 3.
The bottom of the main body bottle 3 is provided with a recess that protrudes inside the main body bottle 3.
Table 2 shows the specifications of the container 1 with a cap.
* 1 to 5 in Table 2 indicate the following.
* 1 High-density polyethylene (Mitsui Chemicals).
* 2 PE-M SSC MC2473 Blue (manufactured by Dainichi Seika Co., Ltd.).
* 3 Measured with calipers.
* 4 Polypropylene (Mitsui Chemicals).
* 5 PP-M AZ MC1461 yellow (manufactured by Dainichi Seika Co., Ltd.).

[Evaluation of usability]
Usability after the bleaching composition was stored at 50 ° C. for 1 month was evaluated as follows.
500 mL of the bleaching agent composition of each example was stored in a container with a cap shown in FIG. 1, and the container 1 was stored at 50 ° C. for 1 month and then allowed to stand at room temperature (about 25 ° C.) for 1 day. For the subsequent container 1, two evaluators evaluated each of the ease of measurement from the main body bottle 3 to the measurement cap 2 and the ease of application from the measurement cap 2 to clothing (of the two evaluators). The one with a poor score was adopted), and the total ease of use was expressed as “usability” in the following four stages. The results are shown in Tables 3-4.
A: Easy to use.
◯: The tromi (viscosity of the bleaching composition) of the liquid after the storage was different from that before the storage, but there was no particular problem in the ease of use.
(Triangle | delta): Compared with before storage, discharge | emission of the liquid from the measurement cap 2 was late | slow, and it was a little hard to apply to clothing.
X: It was easy to drip from the measuring cap 2, or it was difficult to apply to clothes compared to before storage.

As is clear from the results in Table 3, it was confirmed that the bleaching compositions of Examples 1 to 15 of the present invention had a good effect of removing sebum stains and a good detergency against hydrophobic stains. .
Moreover, it was confirmed that the bleaching compositions of Examples 1 to 15 were suppressed in viscosity change with time and were excellent in usability.

From the results of Table 4, in the bleaching compositions of Comparative Examples 1 to 3 lacking the component (a) in the present invention, separation was observed with time in Comparative Examples 1 and 3, and viscosity change was observed in Comparative Example 2. It was too large, and it was confirmed that the evaluation of usability was bad.
In the bleaching agent compositions of Comparative Examples 4 to 6 lacking the component (c) in the present invention, it was confirmed that the effect of removing sebum dirt was poor and the detergency against hydrophobic dirt was poor.

It is a side view which shows the external appearance of the container with a cap used in the Example.

Explanation of symbols

1 Container with cap 2 Measuring cap 3 Body bottle 5 Nozzle cap

Claims (1)

A secondary alkanesulfonic acid having an alkyl chain length of 13 to 17 carbon atoms and / or a salt thereof (a) of 0.1 to 3% by mass ;
Hydrogen peroxide (b);
A liquid bleaching agent composition comprising 0.1 to 3% by mass of a polymer compound (c) having an alkylene terephthalate unit and an oxyalkylene unit.

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